限苹果手机，以下自测通过，安卓手机不支持 loadedmetadata
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input type="file" accept="video/*" capture="user" id='upload'>
<button onclick='getVideoTime()'>获取时长</button>
</body>
<script>
function getVideoTime() {
let fileVIdeo = document.getElementById("upload")
const pickOne =fileVIdeo.files[0]
window.URL = window.URL || window.webkitURL
const url = window.URL.createObjectURL(pickOne)
const audioElement = new Audio(url)
audioElement.addEventListener('loadedmetadata', (_event) => {
const duration = audioElement.duration
console.log('视频时长：' + duration + '秒')
if (duration > 5) {
this.$showToast('请控制录制时间在5秒之内')
return
}
const size = pickOne.size / 1024 / 1000
if (size > 5) {
this.$showToast('视频文件过大，请控制在3秒之内')
return
}
this.toCheckFace(event)
})
}
</script>
</html>
